package com.woniuxy01;

/**
 * @author 作者
 * @create 2025-07-22 14:13
 */
public class BookTest {
    public static void main(String[] args) {
        Book book1 = new Book();
        System.out.println(book1.showInfo());

        Book book2 = new Book("book2", "isbn2", "author2", "publisher2", 50);
        System.out.println(book2.showInfo());

        Book book3 = new Book("book3", "isbn3", "author3");
        System.out.println(book3.showInfo());
    }
}
